This is a 6X17cm pinhole image of Anchorage taken on Kodak Ektar 100, with a light falloff corrected camera to avoid "edge fade" and "image curve," at -20ºF from the mouth of Ship Creek in near complete darkness. It's over a two-hour exposure. I spent the time hugging an iceberg to stay out of the wind and "warmer," hoping my phone wouldn't die, as that is what I was using to time the exposure. 

The color shifts are due to low light reciprocity failure in the film (basically, exposures over the time the film was designed for take logarithmically longer to collect photons and cause the chemical reaction to produce an image as time increases) and reduced chemical reactivity rates due to film that was going from body temperature to -20ºF over the course of two hours. 

In the end... it turned out surprisingly well. I wasn't sure it would work when I was sitting on a chunk of ice in the dark doing the math on this one using some flakey light meter readings taken at almost complete darkness.